Window lock



May 11 1926. 1,584,581

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WINDOW LOCK Filed June 24, 1925 F15/@1. F@ Z,

INVENTOR Patented May ll, 1925.,

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CHARLES MELVIN 'WILSON AND HAROLD E. HARKNESS, 0F JAMESTOW'N, NEVI' YORK.

WINDOW LOCK.

Application filed June 24, 1925.

This invention relates to improvements in window locks.

The principal object of the invention resides in a device adapted to be applied to one of the sashes of a window and operable for locking both sashes against movement to an open position, or to a further open position in the event that the sashes are partially opened for Ventilating purposes.

Another object is to provide a locking device which cannot be jimmied from the outside of a window by persons intent of committing robbery within.

A further object of the invention is to r provide a window lock which is simple -in construction, cheap of manufacture, easy to apply to the sash of a window and highly efficient for the purpose intended.

With these and other objects in view, the invention resides in certain novel construction and combination and arrangement of parts, the essential features of which-are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing, in which Figure 1 is a vertical sectional view through the meeting rails of la pair of window sashes with our improved loch applied thereto, and Showing the position of they latch member prior to its movement to alocked position.

Figure 2 is a view with the latch in a locked position.

Figure 3 is a view ofthe lock per se but showing in dotted lines the position of the 'latch member when in inoperative position.

Figure 4 is a'longitudinal sectional view on the line 4 4 of Figure 3.

Figure 5 is a plan view of a modified form of lock.

Referring more particularly to the drawing, the reference numeral designates our improved sash lock in its entirety and which is shown in the drawing as attached to the top rail 11 of the lower sash A of a window, for co-action with one of the side rails 12 of an upper sash B. The locking device is adapted to be secured by one of the top rails 11 on the inside of the sash as to co-act with any portion of the entire length of the side rail 12 of the upper sash, which permits the sashes to be locked in various open posi- Serial No. 39,338.

The lock 10 includes a base plate 13, having walls 14 rising from the side edges thereof and which walls serve to support a shaft 15. The base 18 is provided with openings 16 for the passage of fastening elements in the nature of screws or the like, for securing the device to the top rail 11. Then attaching the device to the sash, the front end of the base is adapted to overhang the front edge of the lower sash to bridge the space between the meeting rails of the sashes to prevent tampering with the latch member 1'? from the outside of the window.

The latch member 17 is provided with spaced ears 18 through which the shaft 15 passes, for swingingly mounting the latch member to the base. A spring 19 encircles the shaft between the ears 1S* and has its free ends respectively engaging the top face of the latch member and the base plate 13 to normally force the latch member against the base plate. The width of the latch member is less than the distance between the side walls 14 and when in operative position, the latch member is disposed against one of the side walls to permit' a projecting lug 20 on the opposite side edge of the member to he disposed out of the path of the adjacent side wall 14.

The latch member 17 is provided with an angularly disposed clamping" foot 21, the face of which is serrated for engagement with the inner face of the side rail 12 of the upper sash. A manipulating portion 22 extends from the clamping foot for engagement by the lingers vof an operator when desired to lift the latch member out of engagement with the upper sash and against the action of the spring 19.

In Figure 1 of the drawing, we have shown the sashes A and B in a closed position and with the rounded heel of the foot 21 being held against the side rail 12 by the action of the spring` 19. Should an attempt be made to open either the upper or lower sash, the particular sash will move a slight distance until the clamping foot 21 has been upset to cause the serrated face of the foot to against the inner face of the side rail 12, thus locking both sashes against further movement to an open position.

Should it be desired to lock the sashes after they have been opened a predetermined distance to allow air to enter a room foi ventilating purposes, the same lnay be locked against the further movement in the same manner as above described.

7When not in use, the latch member 17 is manually moved transversely of the base plate and upon the shaft l5 so that the lug 2O will be disposed in the path of the adjacent side wall let and will rest thereon, thus holding the clamping toot 2l out of contact with the side rail l2 and against the action of the spring 19.

As herein before mentioned, the base plate overhangs the top rail ll and prevents au instrument from being inserted between the sashes with an etlort ot lifting the latch member out ot coacting engagement with the upper sash.

In Figure 5 of the drawing, we have shown a slightly moditied form ot' holding means for the latch member 17 which is adapted to support the latch member in a raised or inoperative position. In this particular form, one ot the ears 18 is cut-away to `torni a shoulder 23 for engagement with a shoulder 24 formed on a knuckle rising from the base. The spring 19 normally tends to hold the latch member against the base, but. as the latch member is swung backward about its pivot and moved laterally` the shoulders 23 and 24; co-act and support the latch member out of the path of the upper sash.

7hile We have described what We deem tf.- be the most desirable embodiment ot our invention, it is obvious that many ot the details may be. varied Without in any Way departing from the spirit ot our invention, and We therefore do not limit ourselves to the exact det-ails ot construction herein set forth nor to anything less than the whole ot our invention limited only by the appended claims.

What is claimed as new is 1. In combination with the upper and lower sliding sashes of a Window, a locking device carried by the top rail of the lower sash including an attaching plate, a latch member swingingly mounted upon said attaching plate, a foot portion formed on said latch member, spring means for normally holding the heel ot said foot portion in engagement with the upper sash, whereby movement of either sash to an open posit ion will cause said :toot portions to move into jamming engagement with said upper sash for limiting 'further movement of either sash, and co-acting means between said attaching plate and said latch membei operable upon latcral movement otI .said latcl member for holdin;r .said latch member iu an inoperative position against the action of the Spring HICDS.

2. A n'indov.v sash loci: comprising an attaching plate, a latch member pivotrdh mounted thereto tor lateral moven'rent. spring means for normally placing .said latch member under tension, and eri-acting means between said attaching plate and said latch member operal'ile upon lateral movement of said latch member for holding .said latch member in a raised position against the action of said means. i'

3. ln combination with the upper and loiver sliding sashes ot a Window. a lockingdevice carried by the top rail ot the l vier sash including an attaching base plate o\'er lapping the meeting edges ot said sas-hes having side walls tor supporting a shalt, a latch member swingingly mounted upon said shaft: a foot portion 'formed on said latch member and having a rounded heel, a serrated surface orer the 'toot portion. a manipulating portion eo-extensive with said foot portion; spring means for normali) holding the heel ot'l said toot portion in engagement with the upper sash whereby movement ot either sash to an open position will cause said foot, portion to more into jamming engagement with said upper sash for linuting further movement of either sash: and coacting means between said base plate and said latch member operable upon lateral movement for holding said latch member in a raised position against the action ot the spring means,

In testimony ivhercot vte have aliixed our signatures.

CHARLES MELVIN VILSON. HAROLD E. HARKNESS. 

